Xteink X4: Compact e-reader attaches to iPhones thanks to MagSafe and can display more than just e-books

X4: Compact e-reader fits the iPhone. (Image source: Xteink)

A new and particularly compact e-reader can be attached to a compatible smartphone and so may be a particularly practical way to read e-books or articles for some. It can also display information such as QR codes or flight information.

Silvio Werner (translated by Jacob Fisher), Published 12/04/2025 🇩🇪

E-Ink Launch

The Xteink X4 is a compact e-reader that is now available for $69. The device can be used as a standalone device, but it can also be magnetically attached to a compatible smartphone. It measures 114 x 69 x 5.9 millimeters and weighs 74 grams. The e-reader is not powered by a SoC, but rather by an ESP32, which is widely used in the maker scene. A 32 GB microSD card is on board. WiFi and Bluetooth are supported, making it easy to transfer content. The capacity of the 650 mAh battery is quite small, but it should still provide up to 14 days of battery life when used for one to three hours a day.

The display measures 4.3 inches diagonally and has a pixel density of 220 PPI. The Xteink X4 is advertised for a wide range of uses, but the small screen means that only a small amount of text fits on each page, so you have to turn the page and change lines quite often. But it can also be used to easily display boarding passes for flights, membership cards or calendars, for example. Supported file types include ePUB, text files, BMP and JPG. Users should note that the e-reader does not have a touchscreen, so the buttons on the side are essential for operation.

Source(s)

Xteink

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Editor of the original article: Silvio Werner - Senior Tech Writer - 15921 articles published on Notebookcheck since 2017

I have been active as a journalist for over 10 years, most of it in the field of technology. I worked for Tom’s Hardware and ComputerBase, among others, and have been working for Notebookcheck since 2017. My current focus is particularly on mini PCs and single-board computers such as the Raspberry Pi – so in other words, compact systems with a lot of potential. In addition, I have a soft spot for all kinds of wearables, especially smartwatches. My main profession is as a laboratory engineer, which is why neither scientific contexts nor the interpretation of complex measurements are foreign to me.

contact me via: silvio39191, LinkedIn

Translator: Jacob Fisher - Translator - 2579 articles published on Notebookcheck since 2022

Growing up in regional Australia, I first became acquainted with computers in my early teens after a broken leg from a football (soccer) match temporarily condemned me to a predominately indoor lifestyle. Soon afterwards I was building my own systems. Now I live in Germany, having moved here in 2014, where I study philosophy and anthropology. I am particularly fascinated by how computer technology has fundamentally and dramatically reshaped human culture, and how it continues to do so.

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